Infiltrative endometriosis without endometrioma: A case report and imaging findings mimicking a bladder malignancy.

Endometriosis affects 10%-15% of women of childbearing age, but the incidence can be as high as 90% in those with chronic pelvic pain. Endometriosis is categorized into ovarian endometriomas, superficial peritoneal implants, and deep infiltrating endometriosis. In this case report a 40-year-old woman gravida 1, para 1 with a history of hysterectomy in Mexico presented with chronic abdominal pain and severe hematuria. Magnetic resonance imaging revealed an infiltrative pelvic mass involving the bladder concerning for a neoplasm that demonstrated subtle hyperintense components on T1-weighted images. The diagnosis of infiltrative endometriosis was established following cystoscopy and tissue sampling. This case highlights the importance of considering endometriosis in the differential for patients with pelvic masses, and recognizing potential features that could suggest the diagnosis.

Unilateral axillary lymphadenopathy following COVID-19 vaccination: A case report and imaging findings.

As more people receive coronavirus disease 2019 (COVID-19) vaccinations, the side effects of the vaccines will become more apparent. One reported side effect that has come to light is unilateral axillary lymphadenopathy ipsilateral to the vaccination site. In general, unilateral axillary lymphadenopathy has a broad differential including malignancy, infection, autoimmune disorder, and iatrogenic etiologies. We present a case of a previously healthy 38-year-old woman who received her first dose of Pfizer COVID-19 vaccination 3 days prior to presenting to the emergency department complaining of 2 weeks of abdominal pain and 20-pound unintentional weight loss. Unilateral axillary lymphadenopathy, ipsilateral to the vaccination site, was found on a contrast-enhanced computed tomography examination of the chest, abdomen, and pelvis. Subsequent diagnostic mammograms did not demonstrate evidence of malignancy; however, axillary ultrasound again revealed nonspecific lymphadenopathy. A short-term follow-up axillary ultrasound was recommended, rather than a lymph node biopsy, given the history of recent vaccination. At clinical follow-up, the patient's abdominal pain resolved and no further weight loss was noted. This case report discusses the key components and workup recommendation of unilateral axillary lymphadenopathy in the setting of COVID-19 vaccination.